[PATCH] D77168: Add a flag to debug automatic variable initialization

[Stephen Hines via Phabricator via cfe-commits]

srhines added a comment.

In D77168#1955312 <https://reviews.llvm.org/D77168#1955312>, @jfb wrote:

> Do you not think `pragma` is a more general approach? That's what's used in a bunch of other cases, and I'd like to see it attempted here.
>  If not, I agree with John that just counting up isn't a good bisection experience. I'd rather see a begin / end bound.


I agree that begin/end is actually better.

My experience has been that you really don't want to be modifying source files if you can avoid it, as that is harder to automate in a script. And you do want to script this kind of debugging because it isn't a compiler crash, it's often a runtime issue that might take longer to reproduce/etc., so I think that it is preferable to remove the human (error prone) element of adding/tweaking pragmas. I did say that the pragmas are useful in other ways, but I don't think that it is effective for everything.

> You're also missing the auto-init in `initializeAlloca`.


Repository:
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https://reviews.llvm.org/D77168